Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
WINE GLASSES FROM BOTTLES…
It happens that the house accumulates a large amount of glass bottles of colored glass, unusual and beautiful in form that it is a pity to throw away. Such containers can serve as...
SANI – “ATV”
If you remember that sports cross-country skis designed for movement, mainly for the track, and a wide hunting transcend any snow, it will be very clear what the proposed design is a...
